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                                <h1 id="process-&#x8FDB;&#x7A0B;">process &#x8FDB;&#x7A0B;</h1>
<p><code>process</code> &#x5BF9;&#x8C61;&#x662F;&#x4E00;&#x4E2A;&#x5168;&#x5C40;&#x53D8;&#x91CF;&#xFF0C;&#x5B83;&#x63D0;&#x4F9B;&#x6709;&#x5173;&#x5F53;&#x524D; Node.js &#x8FDB;&#x7A0B;&#x7684;&#x4FE1;&#x606F;&#x5E76;&#x5BF9;&#x5176;&#x8FDB;&#x884C;&#x63A7;&#x5236;&#x3002; &#x4F5C;&#x4E3A;&#x4E00;&#x4E2A;&#x5168;&#x5C40;&#x53D8;&#x91CF;&#xFF0C;&#x5B83;&#x59CB;&#x7EC8;&#x53EF;&#x4F9B; Node.js &#x5E94;&#x7528;&#x7A0B;&#x5E8F;&#x4F7F;&#x7528;&#xFF0C;&#x65E0;&#x9700;&#x4F7F;&#x7528; <code>require()</code>&#x3002; &#x5B83;&#x4E5F;&#x53EF;&#x4EE5;&#x4F7F;&#x7528; <code>require()</code> &#x663E;&#x5F0F;&#x5730;&#x8BBF;&#x95EE;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-keyword">const</span> process = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;process&apos;</span>);
</code></pre>
<h3 id="&#x83B7;&#x53D6;&#x8FDB;&#x7A0B;&#x4FE1;&#x606F;">&#x83B7;&#x53D6;&#x8FDB;&#x7A0B;&#x4FE1;&#x606F;</h3>
<pre><code class="lang-js"><span class="hljs-keyword">const</span> nodePath = process.execPath;
<span class="hljs-built_in">console</span>.log(<span class="hljs-string">`node&#x8DEF;&#x5F84;:<span class="hljs-subst">${nodePath}</span>`</span>);

<span class="hljs-keyword">const</span> version = process.version;
<span class="hljs-built_in">console</span>.log(<span class="hljs-string">`node&#x7248;&#x672C;:<span class="hljs-subst">${version}</span>`</span>);

<span class="hljs-keyword">const</span> versions = process.versions;
<span class="hljs-built_in">console</span>.log(<span class="hljs-string">`&#x4F9D;&#x8D56;&#x5E93;&#x7248;&#x672C;:<span class="hljs-subst">${JSON.stringify(versions)}</span>`</span>);

<span class="hljs-keyword">const</span> platform = process.platform;
<span class="hljs-built_in">console</span>.log(<span class="hljs-string">`&#x8FD0;&#x884C;&#x5E73;&#x53F0;:<span class="hljs-subst">${platform}</span>`</span>);

<span class="hljs-keyword">const</span> title = process.title;
<span class="hljs-built_in">console</span>.log(<span class="hljs-string">`&#x7A97;&#x53E3;&#x6807;&#x9898;:<span class="hljs-subst">${title}</span>`</span>);

<span class="hljs-keyword">const</span> env = process.env;
<span class="hljs-built_in">console</span>.log(<span class="hljs-string">`&#x64CD;&#x4F5C;&#x7CFB;&#x7EDF;&#x73AF;&#x5883;&#x4FE1;&#x606F;:<span class="hljs-subst">${JSON.stringify(env)}</span>`</span>);

<span class="hljs-keyword">const</span> arch = process.arch;
<span class="hljs-built_in">console</span>.log(<span class="hljs-string">`&#x5904;&#x7406;&#x5668;&#x67B6;&#x6784;:<span class="hljs-subst">${arch}</span>`</span>);
</code></pre>
<p>shell,&#x6709;&#x4E9B;&#x6587;&#x5B57;&#x8FC7;&#x957F;&#xFF0C;&#x5DF2;&#x7701;&#x7565;:</p>
<pre><code class="lang-shell">node&#x8DEF;&#x5F84;:/home/veng/environment/nvm/versions/node/v10.15.3/bin/node
node&#x7248;&#x672C;:v10.15.3
&#x4F9D;&#x8D56;&#x5E93;&#x7248;&#x672C;:{&quot;http_parser&quot;:&quot;2.8.0&quot;,&quot;node&quot;:&quot;10.15.3&quot;,&quot;v8&quot;:&quot;6.8.275.32-node.51&quot;,&quot;uv&quot;:&quot;1.23.2&quot;,&quot;zlib&quot;:&quot;1.2.11&quot;,&quot;ares&quot;:&quot;1.15.0&quot;,&quot;modules&quot;:&quot;64&quot;,&quot;nghttp2&quot;:&quot;1.34.0&quot;,&quot;napi&quot;:&quot;3&quot;,&quot;openssl&quot;:&quot;1.1.0j&quot;,&quot;icu&quot;:&quot;62.1&quot;,&quot;unicode&quot;:&quot;11.0&quot;,&quot;cldr&quot;:&quot;33.1&quot;,&quot;tz&quot;:&quot;2018e&quot;}
&#x8FD0;&#x884C;&#x5E73;&#x53F0;:linux
&#x7A97;&#x53E3;&#x6807;&#x9898;:/home/veng/environment/nvm/versions/node/v10.15.3/bin/node
&#x64CD;&#x4F5C;&#x7CFB;&#x7EDF;&#x73AF;&#x5883;&#x4FE1;&#x606F;:{&quot;PATH&quot;:&quot;/home/veng/environment/jdk-8u221-linux-x64/jdk1.8.0_221/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin&quot;,...}
&#x5904;&#x7406;&#x5668;&#x67B6;&#x6784;:x64
</code></pre>
<hr>
<h3 id="&#x63A5;&#x53D7;&#x8F93;&#x5165;&#x6570;&#x636E;">&#x63A5;&#x53D7;&#x8F93;&#x5165;&#x6570;&#x636E;</h3>
<p>Java&#x4E2D;&#x662F;&#x5229;&#x7528; Scanner&#x7C7B;&#xFF0C;&#x53EF;&#x4EE5;&#x7C7B;&#x6BD4;&#x3002;</p>
<pre><code class="lang-js">process.stdin.setEncoding(<span class="hljs-string">&apos;utf8&apos;</span>);

process.stdin.on(<span class="hljs-string">&apos;readable&apos;</span>, () =&gt; {
    <span class="hljs-keyword">let</span> chunk;
    <span class="hljs-comment">// &#x4F7F;&#x7528;&#x5FAA;&#x73AF;&#x786E;&#x4FDD;&#x6211;&#x4EEC;&#x8BFB;&#x53D6;&#x6240;&#x6709;&#x7684;&#x53EF;&#x7528;&#x6570;&#x636E;&#x3002;</span>
    <span class="hljs-keyword">while</span> ((chunk = process.stdin.read()) !== <span class="hljs-literal">null</span>) {
        process.stdout.write(<span class="hljs-string">`&#x6570;&#x636E;: <span class="hljs-subst">${chunk}</span>`</span>);
    }
});

process.stdin.on(<span class="hljs-string">&apos;end&apos;</span>, () =&gt; {
    process.stdout.write(<span class="hljs-string">&apos;&#x7ED3;&#x675F;&apos;</span>);
});
</code></pre>
<h3 id="&#x67E5;&#x770B;&#x5185;&#x5B58;&#x4F7F;&#x7528;&#x60C5;&#x51B5;">&#x67E5;&#x770B;&#x5185;&#x5B58;&#x4F7F;&#x7528;&#x60C5;&#x51B5;</h3>
<p><code>process.memoryUsage()</code> &#x65B9;&#x6CD5;&#x8FD4;&#x56DE; Node.js &#x8FDB;&#x7A0B;&#x7684;&#x5185;&#x5B58;&#x4F7F;&#x7528;&#x60C5;&#x51B5;&#x7684;&#x5BF9;&#x8C61;&#xFF0C;&#x8BE5;&#x5BF9;&#x8C61;&#x6BCF;&#x4E2A;&#x5C5E;&#x6027;&#x503C;&#x7684;&#x5355;&#x4F4D;&#x4E3A;&#x5B57;&#x8282;&#x3002;</p>
<pre><code class="lang-js"><span class="hljs-keyword">const</span> memoryUsage = process.memoryUsage();
<span class="hljs-built_in">console</span>.log(memoryUsage);
</code></pre>
<pre><code class="lang-shell">{ rss: 31444992,
  heapTotal: 6537216,
  heapUsed: 3968704,
  external: 8272 }
</code></pre>
<p><code>heapTotal</code> &#x548C; <code>heapUsed</code> &#x4EE3;&#x8868; V8 &#x7684;&#x5185;&#x5B58;&#x4F7F;&#x7528;&#x60C5;&#x51B5;&#x3002; <code>external</code> &#x4EE3;&#x8868; V8 &#x7BA1;&#x7406;&#x7684;&#xFF0C;&#x7ED1;&#x5B9A;&#x5230; Javascript &#x7684; C++ &#x5BF9;&#x8C61;&#x7684;&#x5185;&#x5B58;&#x4F7F;&#x7528;&#x60C5;&#x51B5;&#x3002; <code>rss</code> &#x662F;&#x9A7B;&#x7559;&#x96C6;&#x5927;&#x5C0F;, &#x662F;&#x7ED9;&#x8FD9;&#x4E2A;&#x8FDB;&#x7A0B;&#x5206;&#x914D;&#x4E86;&#x591A;&#x5C11;&#x7269;&#x7406;&#x5185;&#x5B58;&#xFF08;&#x5360;&#x603B;&#x5206;&#x914D;&#x5185;&#x5B58;&#x7684;&#x4E00;&#x90E8;&#x5206;&#xFF09;&#xFF0C;&#x8FD9;&#x4E9B;&#x7269;&#x7406;&#x5185;&#x5B58;&#x4E2D;&#x5305;&#x542B;&#x5806;&#x3001;&#x4EE3;&#x7801;&#x6BB5;&#x3001;&#x4EE5;&#x53CA;&#x6808;&#x3002;</p>

                                
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